[robbienok]

My furnace is about 10 years old. It runs about 5 to 7 minutes thens shuts off, not heating up to temp on thermostat. It then turns on and cycles over and over until it gets up to the correct temp on thermostat.

[wmproop]

Quote: (Is my a coil bad), what coil would you be thinking about?

[robbienok]

Thanks for responding. I am talking about the A coil. The furnace run 5 or 6 minutes then shuts off before reaching the temperature on the thermostat. I believe the A-coil ia causing th furnce to overheat and shut off then restrt again over and over again until it reaches the temperature on the thermostat.

[wmproop]

There is a coil cleaner you can buy that cleans the coil so you have good circulation blowing ,or pulling air through it, that remedies the overheating of furnace, costs 10-15 bucks